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<HTML
><HEAD
><TITLE
>pthread_kill</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.64
"></HEAD
><BODY
CLASS="REFENTRY"
><H1
><A
NAME="AEN1"
>pthread_kill</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN5"
></A
><H2
>Name</H2
>pthread_kill -- send a signal to a thread</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN8"
></A
><H2
>Synopsis</H2
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
WIDTH="100%"
><TR
><TD
><PRE
CLASS="SYNOPSIS"
> #include <rtl_signal.h>
#include <rtl_sched.h>
int <TT
CLASS="FUNCTION"
>pthread_kill</TT
>(pthread_t <TT
CLASS="PARAMETER"
><I
>thread</I
></TT
>,<TT
CLASS="PARAMETER"
><I
>signo</I
></TT
>);</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN13"
></A
><H2
>DESCRIPTION</H2
><P
>This function is a standard POSIX threads function. <TT
CLASS="FUNCTION"
>pthread_kill</TT
> sends signal <TT
CLASS="PARAMETER"
><I
>signo</I
></TT
> to the realtime thread <TT
CLASS="PARAMETER"
><I
>thread</I
></TT
> previously created by a call to <TT
CLASS="FUNCTION"
>pthread_create</TT
>. <TT
CLASS="FUNCTION"
>pthread_kill</TT
> is a fast and deterministic function if called on threads running on the same processor as the calling thread or interrupt handler. <TT
CLASS="FUNCTION"
>pthread_kill</TT
> can be used to send signals
to threads running on other than current CPU, but this is a more expensive
operation and there may be delays before the signal will be detected by
the target thread.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN22"
></A
><H2
>RETURN VALUE</H2
><P
><TT
CLASS="FUNCTION"
>pthread_kill</TT
> returns 0 on success and a non-zero error code on error.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN26"
></A
><H2
>ERRORS</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
>ESRCH</DT
><DD
><P
>No thread could be found corresponding to that specified by the given thread ID.</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN33"
></A
><H2
>AUTHOR</H2
><P
>Victor Yodaiken (<A
HREF="mailto:support@fsmlabs.com"
TARGET="_top"
>support@fsmlabs.com</A
>)</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN37"
></A
><H2
>NOTES</H2
><P
><TT
CLASS="FUNCTION"
>pthread_kill</TT
> is safe to call from a signal handler, a
thread and from Linux kernel code.
<TT
CLASS="FUNCTION"
>pthread_kill</TT
> is one of the primary means of sending
signals to the general purpose operating system (Linux). A call
<TT
CLASS="FUNCTION"
>pthread_kill(<TT
CLASS="PARAMETER"
><I
>pthread_linux()</I
></TT
>,<TT
CLASS="PARAMETER"
><I
>RTL_LINUX_MIN_SIGNA+n</I
></TT
>)</TT
> for an integer value <TT
CLASS="PARAMETER"
><I
>n</I
></TT
>
will generate irq <TT
CLASS="PARAMETER"
><I
>n</I
></TT
> in the Linux thread.</P
><P
><TT
CLASS="FUNCTION"
>pthread_kill(<TT
CLASS="PARAMETER"
><I
>pthread_linux()</I
></TT
>,<TT
CLASS="PARAMETER"
><I
>RTL_SIG_SUSPEND_LINUX</I
></TT
>)</TT
> sends the Linux thread on the
highest numbered processor an interrupt that will force Linux to suspend itself and
to tell the hardware to ignore all non-RTLinux interrupts (if possible). This
allows a processor on an SMP system to be dedicated to RTLinux. To restore
suspended Linux threads, in order, use RTL_SIG_RESTART_LINUX. The RESERVE_PROCESSOR config option must be selected when building RTLinux to enable this
feature.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN51"
></A
><H2
>SEE ALSO</H2
><A
HREF="pthread_create.3.html"
TARGET="_top"
>pthread_create(3)</A
>, <A
HREF="pthread_linux.3.html"
TARGET="_top"
>pthread_linux(3)</A
><P
>2001 FSMLabs Inc.</P
><P
>All rights reserved.</P
></DIV
></BODY
></HTML
>
|
